<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>翻转世界</title>
  <style>
    
  </style>
</head>

<body>

  <div id="app">
   <h1>{{msg}}</h1>
   <button @click="msg = msg.split('').reverse().join('')">逆转世界</button>
  </div>

  <script src="./vue.js"></script>
  <script>
  
    const app = new Vue({
      el: '#app',
      data: {
        msg:'Hello,World'
      }
    })
  </script>

</body>

</html>